Features: Specially designed for mounting M42 lens on EF-mount EF-S mount digital cameras. The adapter allows you to use lens from old lens or other mount on your new camera and saves cost of buying lens. Quality and super smooth surfaces treatments, advanced electronic focusing technology, can accurately focused. With focusing prompt, and support aperture-priority AV-mode and manual M mode exposure. Allows focusing-infinity. Specifications: Material: Metal Compatibility: M42 Screw Mount Lens Applicable Models: for 5DMarkIV III II 1D-series 7D II 7D 80D 70D 60D 50D 1300D 1200D 1100D 1000D 760D 750D 700D 650D 550D 500D 450D 400D 350D 300D /Rebel T6i-T6 T5i-T5 T4i T4 T3i / X80-X70-X50 X7i X6i X7-X5 and other EF-mount/EF-S Mount Cameras Note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different monitor resolution. Package includes: 1 Piece Adapter Ring